package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.*;
import com.sky.webSocketServer.WebSocketServer;
import io.swagger.util.Json;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer websocketServer;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理业务异常《地址和购物车为空》
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //查询当前用户购物车数据
        ShoppingCart shoppingCart =ShoppingCart
                .builder()
                .userId(BaseContext.getCurrentId())
                .build();
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(BaseContext.getCurrentId());

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //向明细表插入数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId()); //设置当前订单明细的关联订单id
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空当前用户的购物车数据
        shoppingCartMapper.delete(BaseContext.getCurrentId());


        //下单提醒
        Map map = new HashMap();
        map.put("type",1); //1，来单提醒，2，表示催单
        map.put("orderId",orders.getId());
        map.put("content","订单号："+orders.getId());
        String json = JSON.toJSONString(map);
        websocketServer.sendToAllClient(json);

        //封装VO返回结果
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
    }

    /**
     * 支付
     * @param ordersPaymentDTO
     * @return
     * @throws Exception
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap();
        map.put("type",1); //1，来单提醒，2，表示催单
        map.put("orderId",orders.getId());
        map.put("content","订单号："+outTradeNo);

        String json = JSON.toJSONString(map);
        websocketServer.sendToAllClient(json);
    }

    /**
     * 用户分页查询历史订单
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult pageQuery4User(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());

        Page<Orders> page =orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id
                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO orderCheck(Long id) {
        OrderVO orderVO = new OrderVO();
        orderVO = orderMapper.getById(id);
        if (orderVO == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        orderVO.setOrderDetailList(orderDetailMapper.getByOrderId(id));
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Transactional
    public void cancel(Long id) throws Exception {
        if(orderMapper.getById(id)==null)
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);

        Orders orders = orderMapper.getById(id);

        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     *
     * @param id
     */
    public void regetOrder(Long id) {
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public OrderStatisticsVO statisticsCheck() {
        //核心就是要根据当前订单表order，把对应status全部查出来
        //我感觉写一个根据status查询，查三次就行了
        //性能差，但是代码耦合性低
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();

        orderStatisticsVO.setToBeConfirmed(orderMapper.getNumberByStatus(Orders.TO_BE_CONFIRMED));
        orderStatisticsVO.setConfirmed(orderMapper.getNumberByStatus(Orders.CONFIRMED));
        orderStatisticsVO.setDeliveryInProgress(orderMapper.getNumberByStatus(Orders.DELIVERY_IN_PROGRESS));

        return orderStatisticsVO;
    }

    /**
     * 条件查询订单
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


    /**
     * 商家接单
     * @param ordersConfirmDTO
     */
    public void orderConfirm(OrdersConfirmDTO ordersConfirmDTO) {
        //首先查询存不存在
        Long id = ordersConfirmDTO.getId();
        Orders orders = orderMapper.getById(id);
        if (orders ==null)
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        //然后判断合不合法
        if(orders.getStatus()!=Orders.TO_BE_CONFIRMED)
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        //最后执行订单状态修改
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }


    /**
     * 商家拒单
     * @param ordersRejectionDTO
     */
    @Transactional
    public void orderReject(OrdersRejectionDTO  ordersRejectionDTO) throws Exception {
        //首先查询存不存在
        Long id = ordersRejectionDTO.getId();
        Orders orders = orderMapper.getById(id);
        if (orders ==null)
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        //然后判断合不合法
        if(orders.getStatus()!=Orders.TO_BE_CONFIRMED)
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        //最后执行订单状态修改

        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
             weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Transactional
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
        }
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Transactional
    public void deliverOrder(Long id) {
        //先查询，然后修改
        Orders orders = orderMapper.getById(id);
        if (orders ==null)
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        //然后判断合不合法
        if(orders.getStatus()!=Orders.CONFIRMED)
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);

        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);

    }

    /**
     * 完成订单
     * @param id
     */
    @Transactional
    public void completeOrder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders ==null)
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        //然后判断合不合法
        if(orders.getStatus()!=Orders.DELIVERY_IN_PROGRESS)
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);

        orders.setStatus(Orders.COMPLETED);
        orderMapper.update(orders);
    }

    /**
     * 客户催单
     * @param id
     */
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders ==null)
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);

        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号："+ orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }


}
